Roger K. Butlin

TL;DR: In this paper, the authors applied hybrid zone analysis to the marine snail Littorina saxatilis, which contains two ecotypes, adapted to wave-exposed rocks vs. high-predation boulder fields.

TL;DR: Testing for the randomness of mating in seaweed flies with respect to size, to genotypes at the alcohol dehydrogenase (Adh) locus, and to a chromosomal inversion with which the Adh locus is associated found that animals mated in a positively assortative fashion, but disassortatively withrespect to the AdH locus and the α/β inversion on chromosome I.

TL;DR: This work investigated two contact zones in the marine gastropod Littorina saxatilis and utilized landmark‐based geometric morphometric analysis together with amplified fragment length polymorphism (AFLP) markers to assess phenotypic and genomic divergence between ecotypes under divergent selection.

TL;DR: The results suggest that endogenous postzygotic isolation does not play an important role in the reproductive isolation between C. brunneus and C.jacobsi, or in determining the structure of the hybrid zone, and may be present and should be tested in future studies.

TL;DR: In this article, the authors show that the rate of stochastic loss of weak local differentiation increases with recombination distance to a strongly diverged locus and, above a critical recombinations distance, local loss is faster than local "gain" of new differentiation.